How did the actors from the movie "Trainspotting"

How did the actors from the movie "Trainspotting».
And how to change the location in which to shoot this film.

Ewan McGregor - Renton




Robert Carlyle - Begbie


Jonny Lee Miller - Sick Boy


Kelly Macdonald - Diane


Ewen Bremner - Spud


Kevin Mckidd - Tommy